Wshp-x module, Sequence of operation, Technical guide 18 – Orion System Water Source Heat Pump X Module User Manual
Page 18: Stand-alone input commands, Input commands (vcm-x wshp or sa connection)

WSHP-X Module
Technical Guide
18
Sequence of Operation
Stand-Alone Input Commands
Compressor On/Off
A 24 volt signal to Binary Inputs #1-4 initiates each Compressor’s On
function. The source for this signal would typically come from Y1 to
Y4 calls from the thermostat.
Heat Enable On/Off
A 24 volt signal on this input indicates the unit is in the Heating Mode.
Typically, the source for this signal is the “O” call from the thermo-
stat.
Water Proof of Flow System On/Off
A 24 volt signal to Binary Inputs #6-7 indicates Water Proof of Flow
for each system.
Suction Pressure Analog Inputs
Sensors from Analog Inputs #1-4 correlate with the Suction Pressure of
each Compressor (250 PSI).
Leaving Water Temperature Thermistor Inputs
T1 correlates with Compressors A1 & A2 (RLY1 and RLY2). T2 cor-
relates with Compressors B1 & B2 (RLY3 and RLY4).
Input Commands (VCM-X WSHP or SA
Connection)
NOTE: When the term “ON” is used, it means there is either 24
VAC on the appropriate Binary Input or a call-to-run
signal is being received from the VCM-X WSHP Series
or SA Series Controller. When the term “OFF” is used,
it means there is either 0 VAC on the appropriate Binary
Input or the call-to-run signal from the VCM-X WSHP
or SA has been removed.
Compressor On/Off
Instead of a physical input signaling the Compressor On/Off function,
the VCM-X WSHP Series Controller or SA Series Controller commu-
nications drives the Compressor On/Off function.
Heat Enable On/Off
As with the Compressor On/Off function, the VCM-X WSHP Series or
SA Series Controller communicates to the Module that it is in Heat Mode.
Table 4: Factory-Set Default Setpoints - Glycol
Glycol Default Setpoints
Description
R22
0%
Glycol
R410-A
0%
Glycol
R410-A
5%
Glycol
R410-A
10%
Glycol
R410-A
15%
Glycol
R410-A
20%
Glycol
R410-A
25%
Glycol
R410-A
30%
Glycol
R410-A
35%
Glycol
R410-A
40%
Glycol
UNSAFE
SUCTION
20 PSIG
40 PSIG
40 PSIG
40 PSIG
40 PSIG
40 PSIG
40 PSIG
40 PSIG
40 PSIG
40 PSIG
LOW SUCTION
HEAT MODE
57 PSIG
100 PSIG
93 PSIG
87 PSIG
82 PSIG
75 PSIG
65 PSIG
58 PSIG
49 PSIG
45 PSIG
LOW SUCTION
COOL MODE
57 PSIG
87 PSIG
85 PSIG
85 PSIG
85 PSIG
85 PSIG
85 PSIG
85 PSIG
85 PSIG
85 PSIG
LOW LEAVING
WATER TEMP
37ºF
37ºF
34ºF
30ºF
27ºF
20ºF
15ºF
9ºF
2ºF
0ºF
Revised: 6/13/13